hadoop fs -mkdir input 报错： No such file or directory

[root@h1 bin]# hadoop fs -mkdir input
17/04/25 00:30:39 WARN util.NativeCodeLoader: Unable to load native-hadoop library for your platform… using builtin-java classes where applicable
mkdir: `input’: No such file or directory

解决方法一：
[root@h1 bin]# hadoop fs -mkdir -p input
17/04/25 00:36:01 WARN util.NativeCodeLoader: Unable to load native-hadoop library for your platform… using builtin-java classes where applicable

解决方法二：
[root@h1 ~]# /opt/bigdata/hadoop/bin/hadoop fs -mkdir input
17/04/25 00:56:10 WARN util.NativeCodeLoader: Unable to load native-hadoop library for your platform… using builtin-java classes where applicable

hadoop的安装路径: /opt/bigdata/hadoop